Members of the media view the General Motors Co. (GM) Cadillac ELR coupe vehicle after the unveiling at the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, 2013. The Detroit auto show runs through Jan. 27 and will display over 500 vehicles, representing the most innovative designs in the world. Photographer: David Paul Morris/Bloomberg less

Members of the media view the General Motors Co. (GM) Cadillac ELR coupe vehicle after the unveiling at the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, ... more

Photo: David Paul Morris, Bloomberg

Members of the media view the General Motors Co. (GM) Cadillac ELR... Photo-4047523.55310 - San Antonio Express-News

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The 2014 Cadillac ELR is introduced at the 2013 North American International Auto Show in Detroit, Michigan, on January 15, 2013. AFP PHOTO/Geoff RobinsGEOFF ROBINS/AFP/Getty Images

The 2014 Cadillac ELR is introduced at the 2013 North American International Auto Show in Detroit, Michigan, on January 15, 2013. AFP PHOTO/Geoff RobinsGEOFF ROBINS/AFP/Getty Images

Photo: GEOFF ROBINS, AFP/Getty Images

The 2014 Cadillac ELR is introduced at the 2013 North American... Photo-4047530.55310 - San Antonio Express-News

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The 2014 Cadillac ELR is introduced at the 2013 North American International Auto Show in Detroit, Michigan, January 15, 2013. AFP PHOTO/GEOFF ROBINSGEOFF ROBINS/AFP/Getty Images

The 2014 Cadillac ELR is introduced at the 2013 North American International Auto Show in Detroit, Michigan, January 15, 2013. AFP PHOTO/GEOFF ROBINSGEOFF ROBINS/AFP/Getty Images

Photo: GEOFF ROBINS, AFP/Getty Images

The 2014 Cadillac ELR is introduced at the 2013 North American... Photo-4047529.55310 - San Antonio Express-News

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The 2014 Cadillac ELR is introduced at the 2013 North American International Auto Show in Detroit, Michigan, January 15, 2013. AFP PHOTO/GEOFF ROBINSGEOFF ROBINS/AFP/Getty Images

The 2014 Cadillac ELR is introduced at the 2013 North American International Auto Show in Detroit, Michigan, January 15, 2013. AFP PHOTO/GEOFF ROBINSGEOFF ROBINS/AFP/Getty Images

Photo: GEOFF ROBINS, AFP/Getty Images

The 2014 Cadillac ELR is introduced at the 2013 North American... Photo-4047528.55310 - San Antonio Express-News

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Taboola Gallery Frame Item-85307.55310 - San Antonio Express-News

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DETROIT, MI - JANUARY 15: Cadillac shows off their ELR extended-range luxury hybrid, during the media preview at the North American International Auto Show on January 15, 2013 in Detroit, Michigan. The auto show will be open to the public January 19-27. less

DETROIT, MI - JANUARY 15: Cadillac shows off their ELR extended-range luxury hybrid, during the media preview at the North American International Auto Show on January 15, 2013 in Detroit, Michigan. The auto ... more

Members of the media view the General Motors Co. (GM) Cadillac ELR coupe vehicle after the unveiling at the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, 2013. The Detroit auto show runs through Jan. 27 and will display over 500 vehicles, representing the most innovative designs in the world. Photographer: David Paul Morris/Bloomberg less

Members of the media view the General Motors Co. (GM) Cadillac ELR coupe vehicle after the unveiling at the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, ... more

Photo: David Paul Morris, Bloomberg

Members of the media view the General Motors Co. (GM) Cadillac ELR... Photo-4047525.55310 - San Antonio Express-News

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The interior of the General Motors Co. (GM) Cadillac ELR coupe vehicle is seen after the unveiling at the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, 2013. The Detroit auto show runs through Jan. 27 and will display over 500 vehicles, representing the most innovative designs in the world. Photographer: David Paul Morris/Bloomberg less

The interior of the General Motors Co. (GM) Cadillac ELR coupe vehicle is seen after the unveiling at the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, ... more

Photo: David Paul Morris, Bloomberg

The interior of the General Motors Co. (GM) Cadillac ELR coupe... Photo-4047524.55310 - San Antonio Express-News

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FILE - In this Monday, Jan. 14, 2013, file photo, the 2014 Chevrolet Corvette Stingray is revealed at media previews for the North American International Auto Show in Detroit. Maybe it was the brand new, bright red Chevrolet Corvette gleaming in one corner, or the elegant BMW coupe in the other, but car companies were positively giddy this week as the North American International Auto Show opened in Detroit. U.S. new car and truck sales reached a five-year high of 14.5 million in 2012, and many executives and analysts think they'll climb to 15.5 million this year. (AP Photo/Paul Sancya, file) less

FILE - In this Monday, Jan. 14, 2013, file photo, the 2014 Chevrolet Corvette Stingray is revealed at media previews for the North American International Auto Show in Detroit. Maybe it was the brand new, bright ... more

Chevrolet introduces the 2014 C7 Corvette Stingray at the 2013 North American International Auto Show at Cobo Center on Monday, January 14, 2013 in Detroit, Michigan. (Kathleen Galligan/Detroit Free Press/MCT)

Chevrolet introduces the 2014 C7 Corvette Stingray at the 2013 North American International Auto Show at Cobo Center on Monday, January 14, 2013 in Detroit, Michigan. (Kathleen Galligan/Detroit Free Press/MCT)

Attendees view the 2014 Chevrolet Corvette Stingray during the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, 2013. The Detroit auto show runs through Jan. 27 and will display over 500 vehicles, representing the most innovative designs in the world. Photographer: David Paul Morris/Bloomberg less

Attendees view the 2014 Chevrolet Corvette Stingray during the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, 2013. The Detroit auto show runs through Jan. ... more

Chevrolet introduces the 2014 C7 Corvette Stingray at the 2013 North American International Auto Show at Cobo Center on Monday, January 14, 2013 in Detroit, Michigan. (Kathleen Galligan/Detroit Free Press/MCT)

Chevrolet introduces the 2014 C7 Corvette Stingray at the 2013 North American International Auto Show at Cobo Center on Monday, January 14, 2013 in Detroit, Michigan. (Kathleen Galligan/Detroit Free Press/MCT)

The 2014 Chevrolet Corvette Stingray is displayed on a wall during the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, 2013. The Detroit auto show runs through Jan. 27 and will display over 500 vehicles, representing the most innovative designs in the world. Photographer: David Paul Morris/Bloomberg less

The 2014 Chevrolet Corvette Stingray is displayed on a wall during the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Tuesday, Jan. 15, 2013. The Detroit auto show runs ... more

Photo: David Paul Morris, Bloomberg

The 2014 Chevrolet Corvette Stingray is displayed on a wall during... Photo-4047539.55310 - San Antonio Express-News

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Taboola Gallery Frame Item-85307.55310 - San Antonio Express-News

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The 2014 Chevrolet Corvette Stingray sits covered during the unveiling ahead of the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Sunday, Jan. 13, 2013. The new model, set to reach dealers in this year’s third quarter, is part of the push to breathe new life into the Chevy brand, which accounted for 71 percent of GM’s 2012 U.S. sales. Photographer: Daniel Acker/Bloomberg less

The 2014 Chevrolet Corvette Stingray sits covered during the unveiling ahead of the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Sunday, Jan. 13, 2013. The new model, set ... more

A teddy bear sits on top of the 2014 Chevrolet Corvette Stingray after the unveiling ahead of the 2013 North American International Auto Show (NAIAS) in Detroit, Michigan, U.S., on Sunday, Jan. 13, 2013. The new model, set to reach dealers in this year’s third quarter, is part o